Sand box



FIG. 1 is a top plan view of a sand box showing my new design;

FIG. 2 is a front elevational view, the rear elevational view being a mirror image thereof;

FIG. 3 is a right-side elevational view, the left-side elevational view being a mirror image thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a top plan view with the cover panels in folded position; and

FIG. 6 is a front elevational view of the sand box as shown in FIG. 5, the rear elevational view being a mirror image thereof. 

The ornamental design for a sand box, as shown and described. 